After a bit of research, I've found the following facts about caffeine in Canada.

From: Food and Drug Regulations: Miscellaneous Food Additives
First of all, caffeine can only be added in "cola type beverages" at a maximum strength of 200 ppm (particles per million). There are different laws regarding teas and coffee. This is why the myth about not allowing caffeine in clear liquids (or other fruit based drinks) exists. It's true.
Therefore, you can't get anything stronger than Jolt Cola, which contains caffeine at 198ppm. Or in a 20 oz bottle as they're sold in 7-11's across the country, 120mg. (source: jolt website).

However, there is an exception to every rule.
There is nothing regulating the usage of guaranine in food or beverage. Which is probably why it is contained in the high energy drinks, such as Bawls. Guaranine is a chemical with much the same properties of caffeine, found in the Guarana seed. According to the Bawls website a 20 oz portion of Bawls would have the equivalent of 333 mg caffeine. (80 mg guaranine / 12 oz, times 2.5 the strength of caffeine). This probably explains why I overreact to Bawls.
Note: I have not seen much to back up the claim that guaranine is much, if any, more powerful than caffeine.

The lethal dosage of caffeine/guaranine (well, lethal dose for 50% of the population, the LD50) is 10 grams.